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Westerbeke 50 - Page 37

Westerbeke 50
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CRANKSHAFT
END-FWAT
Check
and
adjust
12.21.26
1
NA
2 Check
the
crankshaft
end-float using a
dial gauge against
the
crankshaft
pulley
bolt.
If
end-float is
outside
the
limits given in DATA, change
the
thrust
washers as described in
the
following paragraphs.
3 Drain
the
sump.
4 Release thtl. oil
pipe
clip from
the
gearbox
mounting
plate
and
move
the
oil
pipe
aside.
5 Remove
the
sump.
6 Remove
the
oil
pump
and
its drive
shaft.
7 Remove
the
two
bolts
from
the
centre
main bearing cap.
8 Remove
the
centre
main bearing cap.
9 Remove
the
bottom
halves
of
the
thrust
washers from
the
cap
or
crankshaft.
10 Slide
the
upper
halves
of
the
thrust
washers
around
the
crank
and
remove
them.
11
Select a
set
of
thrust
washers
to
give
the
correct
end-float
(see DATA).
12 Reverse
the
procedure
in 3
to
10,
noting:
a
Fit
the
thrust
washers
with
their
grooved
sides towards
the
crankshaft.
b
Fit
the
main bearing
cap
with
the
'FRONT'
mark
towards
the
front
of
the
engine.
DATA
Crankshaft end-float
..............
.
Thrust
washer thicknesses
..........
.
SNC4778
c Tighten
the
main bearing
cap
bolts
to
75
Ibf
ft
(lOA
kgf
m,
102
Nm).
d Ensure
that
the
end-float
is
correct
after
tightening
the
main
bearing
cap
bolts.
e
Tighten
the
oil
pump
securing
nuts
to
16
Ibf
ft
(2.2
kgf m,
22
Nm).
0.001
to
0.0055
in (0.03
to
0.14
mm)
0.0885
to
0.0905
in
(2.25
to
2.30
mm)
0.091
to
0.093
in (2.31
to
2.36
mm)
and
0.0935
to
0.0955
in
(2.37
to
2.43
mm)
33
CRANKSHAFT
Remove
and
refit
12.21.33
Service tools: 18G 134,
18G
134
CQ, 18G
284,
18G284AC,
18G
1108,
18G
1195
Removing
1
NA
2 Drain
the
sump.
3 Remove
the
engine.
4 Remove
the
daMper
5 Remove
the
flywheel.
6 Remove
the
crankshaft
rear
oil seal
retainer.
7 Remove
the
bolts
securing
the
gearbox
adaptor
plate
and
pull
the
adaptor
plate
off
its
two
locating dowels.
8 Remove
the
two
adaptor
plate gaskets.
9 Remove
the
alternator.
10
Disconnect
the
high-pressure pipes
from
the
injectors.
II
Remove
the
injection
pump
drive oil
feed pipe.
12 Remove
the
timing chain and
the
camshaft gear, see
12.65.12.
13 Remove
the
camshaft locating plate.
14 Remove
the
chain vibration damper.
IS Remove
the
bolt securing each
front
mounting
bracket
to
the
crankcase.
16 Remove
the
two
bolts securing
the
front
mounting
plate
to
the
crankcase.
17 Lift
off
the
front
mounting
plate,
complete
with
injection
pump,
front
mounting
brackets, chain
tensioner
stop-pin,
and
chain tensioner shoe.
18 Withdraw
the
dipstick.
19 Remove
the
sump.
»
...
o

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